Do you ever feel like a plastic bag

Which is a true statement about an exterior angle of a triangle a. it is formed by two segments that are not sides of the triangle, b. it forms a linear pair with one of the interior angles of the triangle, c. it is complementary to one of the interior angles of the triangle. d. it is formed by two segments that are sides of the triangle.

How many solutions does the nonlinear system of equations graphed below have?

If chord ab is congruent to chord cd, then what must be true about ef and eg?